Refactor statement parsing.
Refactor statement parsing.

goby-lang/goby,goby-lang/goby,goby-lang/goby,Maxwell-Alexius/goby,Maxwell-Alexius/goby,hachi8833/goby,hachi8833/goby,Maxwell-Alexius/goby,hachi8833/goby,st0012/Rooby,st0012/Rooby